how to use rsync from local server to remote server

Dear Experts:

I am running zimbra zcs-Network edition just started full backup using zimbra admin console this is in process of backup under /opt/zimbra/backup my server OS is ubuntu. the backup of mail accounts are around 200gb. we have procured new hardware now want to migrate the mail server and backup of mail accounts to new server. Please let me know how to use rsync and transfer this mail backup from the zimbra backup which is under /opt/zimbra/backup to the remote server. please help in how to. Thanks in advance.

thank you very much, this started later due to some changes needed on the source file which to be copied hence terminated the rsync by pressing Control C and did required changes on the source file the one which to be copied latee executes the same above command sync throws an error, permission denied and sync does not happen.